In 1931, the biggest-selling version was either by Russ Columbo[1] or by Wayne King;[2] both versions and recordings by Benny Krueger's orchestra (with a vocal by Smith Ballew) and by Kate Smith all had significant popularity.
[1] In September 1943, Frank Sinatra sang this song on the radio series A Date with Judy.
In 1946, three versions, by Tommy Dorsey's orchestra (with a vocal by Stuart Foster), by Frank Sinatra, and by Skinnay Ennis, all contended for popularity.
It reached a peak position #12 in 8 weeks on the Billboard chart;[3][4] The song has been recorded by many artists (ranging from country-blues legends like Moon Mullican and Jerry Lee Lewis to Dean Martin) and is now a standard.
It was translated into French and performed as "Je ne sais pas pourquoi" by Georges Beauchemin in 1932, and Charles Trenet in 1946.